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Limits on the production of scalar leptoquarks from $Z^0$ decays at LEP
- Source :
- Physics Letters B, Physics Letters B, Elsevier, 1993, 316, pp.620-630, Physics letters: B, DELPHI Collaboration Allen, Paul Castillo Giménez, María Victoria Chrin, J. T. M. Cortina Gil, Eduardo Fez Laso, M. D. M. de Ferrer Soria, Antonio Fuster Verdú, Juan A. García García, Carmen Gómez Cadenas, Juan José Hernández Rey, Juan José Higón Rodríguez, Emilio Lacasta Llácer, Carlos Lozano Bahilo, José Julio Martí García, Salvador Salt Cairols, José Valls Ferrer, Juan Antonio Zúñiga Román, Juan 1993 Limits on the production of scalar leptoquarks from Z (0) decays at LEP Physics Letters B 316 4 620 630, Physics Letters B, 1993, 316, pp.620-630. ⟨10.1016/0370-2693(93)91053-P⟩, RODERIC. Repositorio Institucional de la Universitat de Valéncia, instname
- Publication Year :
- 1993
- Publisher :
- HAL CCSD, 1993.
-
Abstract
- A search has been made for pairs and for single production of scalar leptoquarks of the first and second generations using a data sample of 392000 Z0 decays from the DELPHI detector at LEP 1. No signal was found and limits on the leptoquark mass, production cross section and branching ratio were set. A mass limit at 95% confidence level of 45.5 GeV/c2 was obtained for leptoquark pair production. The search for the production of a single leptoquark probed the mass region above this limit and its results exclude first and second generation leptoquarks D0 with masses below 65 GeV/c2 and 73 GeV/c2 respectively, at 95% confidence level, assuming that the D0lq Yukawa coupling alpha(lambda) is equal to the electromagnetic one. An upper limit is also given on the coupling alpha(lambda) as a function of the leptoquark mass m(D0).
- Subjects :
- Nuclear and High Energy Physics
Particle physics
LUND MONTE-CARLO
Electron–positron annihilation
Scalar (mathematics)
Elementary particle
01 natural sciences
JET FRAGMENTATION
Nuclear physics
PHYSICS
SEARCH
0103 physical sciences
[PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex]
PARTICLES
Leptoquark
E+E COLLIDERS
Limit (mathematics)
SIGNATURES
010306 general physics
Physics
010308 nuclear & particles physics
Branching fraction
High Energy Physics::Phenomenology
Yukawa potential
Pair production
High Energy Physics::Experiment
Física nuclear
Particle Physics - Experiment
Subjects
Details
- Language :
- English
- ISSN :
- 03702693
- Database :
- OpenAIRE
- Journal :
- Physics Letters B, Physics Letters B, Elsevier, 1993, 316, pp.620-630, Physics letters: B, DELPHI Collaboration Allen, Paul Castillo Giménez, María Victoria Chrin, J. T. M. Cortina Gil, Eduardo Fez Laso, M. D. M. de Ferrer Soria, Antonio Fuster Verdú, Juan A. García García, Carmen Gómez Cadenas, Juan José Hernández Rey, Juan José Higón Rodríguez, Emilio Lacasta Llácer, Carlos Lozano Bahilo, José Julio Martí García, Salvador Salt Cairols, José Valls Ferrer, Juan Antonio Zúñiga Román, Juan 1993 Limits on the production of scalar leptoquarks from Z (0) decays at LEP Physics Letters B 316 4 620 630, Physics Letters B, 1993, 316, pp.620-630. ⟨10.1016/0370-2693(93)91053-P⟩, RODERIC. Repositorio Institucional de la Universitat de Valéncia, instname
- Accession number :
- edsair.doi.dedup.....a7b59b5f99f99f3c7526834ec2b46aec
- Full Text :
- https://doi.org/10.1016/0370-2693(93)91053-P⟩